i decided to take a chance on a very cheap import on amazon. it was a mini ballvise. 80 bucks including shipping. to my surprise, it was a bargain. minor dings on the upper half, but rotation was very smooth. xcellent for newbie or pro. this item was made in india. the top lifts off to lube the bearing. when the jaws back out, just clear of the block, the jaws lift up still on the screw. the rubber socket is high friction, and works well with the ball.